Oil-elevator.



PATENTBD MAR. 14, 1905.

P. E. DAVIT'J?. OIL BLEVATOR.

APPLICATION FILED FEB. 18. 1904.

Patented March 14, 1905.

PATENTv OFFICE.

PATRICK H. DAVIIT, OF BRADFORD, PENNSYLVANIA.

OIL-ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 784,991, dated March 14, 1905.

Application led February 18, 1904. Serial No. 194,217.

T0 a/ZZ whom, it mln/y' concern:

Be it known that I, PATRICK H. DAvrrT, a citizen of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania, have invented new and useful Improvements ih Oil-Elevators, of which the following is a specification.

My invention relates to improvements in oil-elevators, and more particularly pertains to that class operated by compressed air.

The object of my invention is to provide a device which is adapted to be placed in the bottom of a well and elevate the oil or water to the surface by compressed air and at the same time absolutely preventing an escape of.

air within the well.

Another object of my invention is to provide a simple and more effective device of this character which is adapted to'elevate a greater quantity of oil or water with less pressure than other devices of this character.

In the accompanying drawing the igure is a vertical sectional view of a well-casing, showing my device inserted therein.

Referring now to the drawing, A represents an air-chamber which is placed within the well-casing adjacent its lower end and which may be of any desired length, as this would be accomplished whether in a deep or shallow well, the said air-chamber, as shown, being a cylindrical form and of a size considerably less than that of the well-casing, the purpose of which will be hereinafterV more fully described. The lower end of'v said air-chamber is internally screw-threaded at a and adapted to receive the screw-threaded plug B, which has its outer wall flush or in a vertical line with the side of the air-chamber. The said plug B is provided with an opening I), into which is secured a short pipe which is adapted to support the T-joint D by means of the internally-screw-threaded sleeve E, and thus it will be seen that each part is removable fory cleaning or replacing the same. The lower end of the said T-joint D is provided with screw-threads d for the purpose of securinga protector thereto, and thus supporting the device above the bottom of the well. The said portion'D of the T-joint D is provided with the air-supply pipe F, which extends up along the side of the air-chamber to the top of the well and through which the airis supplied to the said air-chamber. The upper end of said air-chamber A is also internally screw-threaded and provided with an inside collar G, which has its upper end screwed within a section of a tube H, which forms a part of my improved elevating device, and thus having the inside collar connecting the air-chamber A and the tube H the same will take up less space within the well-casing, as hereinafter more fully described. 'Ihe upper end of the tube H is also internally screw-threaded at a and into which is screwed the inside collar I, the upper end of which is adapted to support a section of casing J, through which the oil is forced to the top of the well.

The inside collar Gr is provided with a central opening C therethrough, the upper end of which is reduced and screw-threaded at C. Screwed within said reduced screw-threaded end O/ of the opening O is a pipe K, which is slightly convergent at its upper end and adjacent thereto is provided with openings 7u, through which the air is adapted to pass from the said chamber to the working barrel. The working barrel L consists of a tube M, which is slightly larger than the lower end of the convergent tube K and is provided with a cupshaped member M' at its lower end, which is provided with a packing m, which forms an air-tight connection between the tube M and ythe convergent .tube K. Surrounding the lower end of the tube K is a coil-spring KQ the lower end of which is adapted to bear against the collar G and the upper end adapted to bear against the lower end of the cup-shaped packing-carrying member MQ carried by the lower end of the working barrel, and thus having a tendency to normally hold the same in an upward position. v

The upper end of the tube M -is internally screw-threaded and into which is screwed a plug W12', which is adapted to close the upper end of the pipe. Screwed uponthe upper end of said tube M is a sleeve M2, which is adapted to support the short tube N, which is provided with openings n, which communicate with the space N', surrounding the tubes M and N., as hereinafter more fully described.

IOO

Screwed upon the upper end of the tube N is a bushing O, which is of a size to snugly tit the inside of the tube H, and thusprevent-the passage of the air upward, but causes the same to pass through the opening n into the tube N. Within the upper end of the bushing O is screwed a tube P, which extends up- `ward through the inside collar I, which is adapted to snugly lit the sides of the tube P. The said collar I is provided with a downwardly-extending member or flange r, which is adapted to engage the bushing O, and thus limiting the upward movement of the working barrel, while the downward movement is limited by the spring K and cup-shaped member M.

Surrounding the tube P within the enlarged tubing H is a coiled spring O, the upper end of which is adapted to bear against the collar I, while the lower end is adapted to rbear against the bushing O and normally hold the working barrel in a downward position against the tension of the spring K. The upper end of the tube P is provided with a piston Q, which is adapted to carry a packing Q', the said piston being of a size to snugly t within the tube J`, below the openingsj, carried by the tube. The said openings joom- .municate with the well-casing, and thus the oil is allowed to How therein, and the tube P being open at its upper end .the oil or water may flow within the working valve, as hereinafter more fully described. The tube P has surrounding the same, above the collar and between it and the piston Q, a coil-spring R, which is adapted to prevent the pounding of the piston on the collar on its downward movement. The tube J, as shown, is provided with internal screw-threads at its upper end and into which is screwed a tube leading to the top of the well. Within the tube J and bearing against the end of a tube which is adapted tobe screwed into the tube J is a packing S, against which lthe piston Q is adapted to strike, and thus preventing the piston from pounding against the end of a tube which is screwed into the end of the tube-section J. f

The normal position of the parts is as shown in the drawing, which allows of the oil or water flowing through the openings j', down through the tube P of the working barrel, and out of the opening n and surrounding the lower end of the working barrel. The oil within the tube S will seek the level of the oil within the well casing-say perhaps twenty, forty, or sixty feet-and then air is admitted 'within the air-chamber A through the medium of the pipe F and the air passes up from the air-chamber through the tube K and enters the working barrel. The air-pressure will not move the working barrel until the pressure is great enough to overcome the tension of the spring O', when air-pressure raises the entire working barrel and at the same time continues to raise the piston Q above the openings j and preventing the oil from passing within the tube-P, and as the same is continuedv to be raised the lower end of the cup-shaped member rises above the opening 7c, thus admitting the air around the working barrel. It will be seen that the opening c is not opened until after the piston Q has passed up above the openings j'. and thus the oil above the opening le is forced upward through the openings a, and all oil above will be forced to the top of the well by the airpressure. The air-pressure is then released and the working barrel is allowed to drop, and thus close the opening and open the openings j, thus allowing the oil to again How within the casing, and the operation is repeated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent. is

.1. An oil-elevator, comprising acasing having oil-inlet openings, air-supply` openings therein, and means for closing the oil-supply openings before the air-supply openings are opened.

2. An oil-elevator, comprisingacasing having oil-inlet openings and air-inlet openings therein, a working barrel within said casing and means carried by the working barrel for closing the oilinlet openings before theairinlets are opened.

3. An oil-elevator, comprising a casing having oil-inlet openings adjacent the upper end, an air-supply chamber in communication with the lower end of said casing, a working barrel within said casing, means carried by said working barrel for controlling the communication between the casing and the air-chamber, and means carried by the said working barrel for controlling the inlet-openings.

4. An oil-elevator, comprisingacasing having oil-inlet openings adjacent the upper end, an air-chamber in communication with the lower end of said casing, a working barrel IOO IIC

within said casing and operated by said air v from the air-chamber, means controlled by said working barrel for controlling the communication between the casing and the airchamber and means carried by the working barrel for controlling the inlet-openings.

5. An oil-elevator, comprising acasing having oil-inlet openings adjacent the upper end, an air-chamber carried by the lowei` end, a pipe in communication with the air-chamber and extending into said casing and having lateral openings intermediate its ends, a working barrel within the casing and inclosing said pipe, and the air-pressure within the pipe adapted to raise the working barrel above said lateral openings, and means carried by the upper end of said Working barrel for closing said oil-inlet openings.

6. An oil-elevator comprising a casing having oil-inlet openings, and air-inlet openings ISO therein, and means within said casing for closing the oil-inlet openings before the air-inlet openings are opened.

7. An oil-elevator comprising a casing having oil-inlet openings and air-inlet openings therein, and a working barrel'within the casing and adapted to close the oil-inlet openings before the air-inlet openings are opened.

8. An oil-elevator comprising a casing having oil-inlet openings adjacent its upper end and air-inlet openings within the lower end, a working barrel within the casing, and means carried by the working barrel for closing the oil-inlet openings before the air-inlet openings are opened.

9. An oil-elevator, comprising a casing having oil-inlet openings adjacent its upper end, an air-chamber in communication with the lower end oi' said casing, a working barrel operated'by the air from said air-chamber, means carried by the upper end of said working barrel for closing said oil-inlet openings.

10. An oil-elevator comprising a casing having oil-inlet openings adjacent its upper end, an air-chamber carried by the lower end of said casing, a pipe communicating with said air-chamber and extending within said casingk and having lateral openings therein intermediate the ends, a working barrel having a chamber in its lower end and adapted to receive the said pipe, said working barrel having openings communicating with the interior thereoic intermediate its ends, and a piston carried by the upper end of said working barrel and adapted to close the oil-inlet open'- ings. y

11. An oil-elevator, comprising a casing having oil-inlet openings at its upper end, anl air-inlet opening at its lower end, a convergent tube extending upward from said opening and having lateral openings intermediate its ends, and a working barrel passing over said convergent pipe and adapted to close said oil-inlet openings before the lateral inletopenings are opened.

12. An oil-elevator, comprising a casing having' oil-inlet openings adjacent its upper end, an oil-chamber carried by the lower end 'of said casing, a pipe communicating with said air-chamber and extending into said casing and having lateral openings therein intermediate its ends` a working barrel vertically movable in said casing andfhaving achamber at its lower end into which passes said pipe, a coil-spring surrounding said pipe and bearing against the lQwer end of said working barrel, said barrelhaving openings extending inwardly above said cham-ber, a piston carried by the upper end of said working barrel, an inwardly-extending bushing carried by the casing, a ange carried by the working barrel below said bushing, a coil-spring surrounding said working barrel above and below said bushing and bearing respectively against the iiange and the piston carried by the working barrel.

13. An oil-elevator, comprising a casing having oil-inlet openings adjacent its upper end, an air-tube extending upwardly within said casing, and having lateral openings therein, a hollow piston adapted to receive said air-tube, a passage-way around said tube and means carried by the piston for closing the oil-inlet openings when the air is passing around the piston.

14. An oil-elevator comprising a casing having oil-inlet openings adjacent its upper end', an air-tube extending upwardly within the bottom of said casing and having lateral openings, a piston within the casing and having a compartment adapted to receive said air-tube, a passage-way around said piston and through the upper end when the piston is above the openings in the air-tube, and the upper end of said piston adapted to close the oil-inlets before the piston rises above the openings in the air-tube.

In testimonywhereof I have hereunto set my hand in the presence of two subscribing witnesses. i

l PATRICK H. DAVITT. Witnesses:

GEORGE C. LESTER, HERMAN H. NORTH. 

